To prepare pineapple, cut off both ends.,Remove rind and eyes with sharp knife.,Cut pineapple into lengthwise quarters.,______,Measure 1 cup pineapple; reserve remaining pineapple for another use.,Place 1 cup pineapple and strawberries in large bowl.,Sprinkle with sugar.,Let stand until ready to use.,Divide fruit among 4 glasses; add 1/2 cup sherbet to each glass.,Pour 1 cup ginger ale into each glass.,Serve immediately.